/*
 * Copyright (c) 1983-2023 Trevor Wishart and Composers Desktop Project Ltd
 * http://www.trevorwishart.co.uk
 * http://www.composersdesktop.com
 *
 This file is part of the CDP System.
 
 The CDP System is free software; you can redistribute it
 and/or modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
 The CDP System is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with the CDP System; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 02111-1307 USA
 *
 */

//  HEREH : ADD PARAMETER TO AVOID int DECAY TAIL BEING FLATTENED
//  compile and test on files on loom

#include <stdio.h>
#include <stdlib.h>
#include <structures.h>
#include <tkglobals.h>
#include <pnames.h>
#include <filetype.h>
#include <processno.h>
#include <modeno.h>
#include <logic.h>
#include <globcon.h>
#include <cdpmain.h>
#include <math.h>
#include <mixxcon.h>
#include <osbind.h>
#include <standalone.h>
#include <ctype.h>
#include <sfsys.h>
#include <string.h>
#include <srates.h>

#ifdef unix
#define round(x) lround((x))
#endif
#ifndef HUGE
#define HUGE 3.40282347e+38F
#endif

#define WINS_PER_ELEMENT    (3)     //  No of envelope windows per element-to-find
#define MAXLEV              (0.95)  //  Maximum output level

char errstr[2400];

int anal_infiles = 1;
int sloom = 0;
int sloombatch = 0;

const char* cdp_version = "6.1.0";

//CDP LIB REPLACEMENTS
static int check_flatten_param_validity_and_consistency(dataptr dz);
static int setup_flatten_application(dataptr dz);
static int parse_sloom_data(int argc,char *argv[],char ***cmdline,int *cmdlinecnt,dataptr dz);
static int parse_infile_and_check_type(char **cmdline,dataptr dz);
static int setup_flatten_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int setup_and_init_input_param_activity(dataptr dz,int tipc);
static int setup_input_param_defaultval_stores(int tipc,aplptr ap);
static int establish_application(dataptr dz);
static int initialise_vflags(dataptr dz);
static int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz);
static int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz);
static int mark_parameter_types(dataptr dz,aplptr ap);
static int assign_file_data_storage(int infilecnt,dataptr dz);
static int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q);
static int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz);
//static int get_the_mode_from_cmdline(char *str,dataptr dz);
static int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt);
static int create_flatten_sndbufs(dataptr dz);
static int flatten_param_preprocess(dataptr dz);
static int is_phase_change(float *ibuf,int *all_zero,int *phasechange,int wstart,int wend);
static int find_phasechange_position(float *ibuf,int *zcrospos,int wstart,int wend);
static int flatten(dataptr dz);

/**************************************** MAIN *********************************************/

int main(int argc,char *argv[])
{
    int exit_status;
    dataptr dz = NULL;
    char **cmdline;
    int  cmdlinecnt;
    int n;
//    aplptr ap;
    int is_launched = FALSE;
    if(argc==2 && (strcmp(argv[1],"--version") == 0)) {
        fprintf(stdout,"%s\n",cdp_version);
        fflush(stdout);
        return 0;
    }
                        /* CHECK FOR SOUNDLOOM */
    if((sloom = sound_loom_in_use(&argc,&argv)) > 1) {
        sloom = 0;
        sloombatch = 1;
    }
    if(sflinit("cdp")){
        sfperror("cdp: initialisation\n");
        return(FAILED);
    }
                          /* SET UP THE PRINCIPLE DATASTRUCTURE */
    if((exit_status = establish_datastructure(&dz))<0) {                    // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if(!sloom) {
        if(argc == 1) {
            usage1();   
            return(FAILED);
        } else if(argc == 2) {
            usage2(argv[1]);    
            return(FAILED);
        }
    }
    if(!sloom) {
        if((exit_status = make_initial_cmdline_check(&argc,&argv))<0) {     // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdline    = argv;
        cmdlinecnt = argc;
        if((get_the_process_no(argv[0],dz))<0)
            return(FAILED);
        cmdline++;
        cmdlinecnt--;
        dz->maxmode = 0;
        // setup_particular_application =
        if((exit_status = setup_flatten_application(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        if((exit_status = count_and_allocate_for_infiles(cmdlinecnt,cmdline,dz))<0) {       // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
    } else {
        //parse_TK_data() =
        if((exit_status = parse_sloom_data(argc,argv,&cmdline,&cmdlinecnt,dz))<0) {
            exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(exit_status);         
        }
    }
//    ap = dz->application;

    // parse_infile_and_hone_type() = 
    if((exit_status = parse_infile_and_check_type(cmdline,dz))<0) {
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    // setup_param_ranges_and_defaults() =
    if((exit_status = setup_flatten_param_ranges_and_defaults(dz))<0) {
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    // open_first_infile        CDP LIB
    if((exit_status = open_first_infile(cmdline[0],dz))<0) {    
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);  
        return(FAILED);
    }
    cmdlinecnt--;
    cmdline++;

//  handle_extra_infiles() : redundant
    // handle_outfile() = 
    if((exit_status = handle_the_outfile(&cmdlinecnt,&cmdline,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }

//  handle_formants()           redundant
//  handle_formant_quiksearch() redundant
//  handle_special_data()       redundant
 
    if((exit_status = read_parameters_and_flags(&cmdline,&cmdlinecnt,dz))<0) {      // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
//  check_param_validity_and_consistency....
    if((exit_status = check_flatten_param_validity_and_consistency(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    is_launched = TRUE;
    dz->bufcnt = 2;
    if((dz->sampbuf = (float **)malloc(sizeof(float *) * (dz->bufcnt+1)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffers.\n");
        return(MEMORY_ERROR);
    }
    if((dz->sbufptr = (float **)malloc(sizeof(float *) * dz->bufcnt))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffer pointers.\n");
        return(MEMORY_ERROR);
    }
    for(n = 0;n <dz->bufcnt; n++)
        dz->sampbuf[n] = dz->sbufptr[n] = (float *)0;
    dz->sampbuf[n] = (float *)0;

    if((exit_status = create_flatten_sndbufs(dz))<0) {                          // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //param_preprocess ...
    if((exit_status = flatten_param_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //spec_process_file =
    if((exit_status = flatten(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if((exit_status = complete_output(dz))<0) {                                     // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    exit_status = print_messages_and_close_sndfiles(FINISHED,is_launched,dz);       // CDP LIB
    free(dz);
    return(SUCCEEDED);
}

/**********************************************
        REPLACED CDP LIB FUNCTIONS
**********************************************/


/****************************** SET_PARAM_DATA *********************************/

int set_param_data(aplptr ap, int special_data,int maxparamcnt,int paramcnt,char *paramlist)
{
    ap->special_data   = (char)special_data;       
    ap->param_cnt      = (char)paramcnt;
    ap->max_param_cnt  = (char)maxparamcnt;
    if(ap->max_param_cnt>0) {
        if((ap->param_list = (char *)malloc((size_t)(ap->max_param_cnt+1)))==NULL) {    
            sprintf(errstr,"INSUFFICIENT MEMORY: for param_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->param_list,paramlist); 
    }
    return(FINISHED);
}

/****************************** SET_VFLGS *********************************/

int set_vflgs
(aplptr ap,char *optflags,int optcnt,char *optlist,char *varflags,int vflagcnt, int vparamcnt,char *varlist)
{
    ap->option_cnt   = (char) optcnt;           /*RWD added cast */
    if(optcnt) {
        if((ap->option_list = (char *)malloc((size_t)(optcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for option_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->option_list,optlist);
        if((ap->option_flags = (char *)malloc((size_t)(optcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for option_flags\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->option_flags,optflags); 
    }
    ap->vflag_cnt = (char) vflagcnt;           
    ap->variant_param_cnt = (char) vparamcnt;
    if(vflagcnt) {
        if((ap->variant_list  = (char *)malloc((size_t)(vflagcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for variant_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->variant_list,varlist);       
        if((ap->variant_flags = (char *)malloc((size_t)(vflagcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for variant_flags\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->variant_flags,varflags);

    }
    return(FINISHED);
}

/***************************** APPLICATION_INIT **************************/

int application_init(dataptr dz)
{
    int exit_status;
    int storage_cnt;
    int tipc, brkcnt;
    aplptr ap = dz->application;
    if(ap->vflag_cnt>0)
        initialise_vflags(dz);    
    tipc  = ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt;
    ap->total_input_param_cnt = (char)tipc;
    if(tipc>0) {
        if((exit_status = setup_input_param_range_stores(tipc,ap))<0)             
            return(exit_status);
        if((exit_status = setup_input_param_defaultval_stores(tipc,ap))<0)        
            return(exit_status);
        if((exit_status = setup_and_init_input_param_activity(dz,tipc))<0)    
            return(exit_status);
    }
    brkcnt = tipc;
    //THERE ARE NO INPUTFILE brktables USED IN THIS PROCESS
    if(brkcnt>0) {
        if((exit_status = setup_and_init_input_brktable_constants(dz,brkcnt))<0)              
            return(exit_status);
    }
    if((storage_cnt = tipc + ap->internal_param_cnt)>0) {         
        if((exit_status = setup_parameter_storage_and_constants(storage_cnt,dz))<0)   
            return(exit_status);
        if((exit_status = initialise_is_int_and_no_brk_constants(storage_cnt,dz))<0)      
            return(exit_status);
    }                                                      
    if((exit_status = mark_parameter_types(dz,ap))<0)     
        return(exit_status);
    
    // establish_infile_constants() replaced by
    dz->infilecnt = 1;
    //establish_bufptrs_and_extra_buffers():
    return(FINISHED);
}

/********************** SETUP_PARAMETER_STORAGE_AND_CONSTANTS ********************/
/* RWD mallo changed to calloc; helps debug verison run as release! */

int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz)
{
    if((dz->param       = (double *)calloc(storage_cnt, sizeof(double)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 1\n");
        return(MEMORY_ERROR);
    }
    if((dz->iparam      = (int    *)calloc(storage_cnt, sizeof(int)   ))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 2\n");
        return(MEMORY_ERROR);
    }
    if((dz->is_int      = (char   *)calloc(storage_cnt, sizeof(char)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 3\n");
        return(MEMORY_ERROR);
    }
    if((dz->no_brk      = (char   *)calloc(storage_cnt, sizeof(char)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 5\n");
        return(MEMORY_ERROR);
    }
    return(FINISHED);
}

/************** INITIALISE_IS_INT_AND_NO_BRK_CONSTANTS *****************/

int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz)
{
    int n;
    for(n=0;n<storage_cnt;n++) {
        dz->is_int[n] = (char)0;
        dz->no_brk[n] = (char)0;
    }
    return(FINISHED);
}

/***************************** MARK_PARAMETER_TYPES **************************/

int mark_parameter_types(dataptr dz,aplptr ap)
{
    int n, m;                           /* PARAMS */
    for(n=0;n<ap->max_param_cnt;n++) {
        switch(ap->param_list[n]) {
        case('0'):  break; /* dz->is_active[n] = 0 is default */
        case('i'):  dz->is_active[n] = (char)1; dz->is_int[n] = (char)1;dz->no_brk[n] = (char)1; break;
        case('I'):  dz->is_active[n] = (char)1; dz->is_int[n] = (char)1;                         break;
        case('d'):  dz->is_active[n] = (char)1;                         dz->no_brk[n] = (char)1; break;
        case('D'):  dz->is_active[n] = (char)1; /* normal case: double val or brkpnt file */     break;
        default:
            sprintf(errstr,"Programming error: invalid parameter type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                               /* OPTIONS */
    for(n=0,m=ap->max_param_cnt;n<ap->option_cnt;n++,m++) {
        switch(ap->option_list[n]) {
        case('i'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1; dz->no_brk[m] = (char)1; break;
        case('I'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1;                          break;
        case('d'): dz->is_active[m] = (char)1;                          dz->no_brk[m] = (char)1; break;
        case('D'): dz->is_active[m] = (char)1;  /* normal case: double val or brkpnt file */     break;
        default:
            sprintf(errstr,"Programming error: invalid option type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                               /* VARIANTS */
    for(n=0,m=ap->max_param_cnt + ap->option_cnt;n < ap->variant_param_cnt; n++, m++) {
        switch(ap->variant_list[n]) {
        case('0'): break;
        case('i'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1; dz->no_brk[m] = (char)1; break;
        case('I'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1;                          break;
        case('d'): dz->is_active[m] = (char)1;                          dz->no_brk[m] = (char)1; break;
        case('D'): dz->is_active[m] = (char)1; /* normal case: double val or brkpnt file */      break;
        default:
            sprintf(errstr,"Programming error: invalid variant type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                               /* INTERNAL */
    for(n=0,
    m=ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt; n<ap->internal_param_cnt; n++,m++) {
        switch(ap->internal_param_list[n]) {
        case('0'):  break;   /* dummy variables: variables not used: but important for internal paream numbering!! */
        case('i'):  dz->is_int[m] = (char)1;    dz->no_brk[m] = (char)1;    break;
        case('d'):                              dz->no_brk[m] = (char)1;    break;
        default:
            sprintf(errstr,"Programming error: invalid internal param type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }
    return(FINISHED);
}

/************************ HANDLE_THE_OUTFILE *********************/

int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz)
{
    int exit_status;
    char *filename = (*cmdline)[0];
    if(filename[0]=='-' && filename[1]=='f') {
        dz->floatsam_output = 1;
        dz->true_outfile_stype = SAMP_FLOAT;
        filename+= 2;
    }
    if(!sloom) {
        if(file_has_invalid_startchar(filename) || value_is_numeric(filename)) {
            sprintf(errstr,"Outfile name %s has invalid start character(s) or looks too much like a number.\n",filename);
            return(DATA_ERROR);
        }
    }
    strcpy(dz->outfilename,filename);      
    if((exit_status = create_sized_outfile(filename,dz))<0)
        return(exit_status);
    (*cmdline)++;
    (*cmdlinecnt)--;
    return(FINISHED);
}

/***************************** ESTABLISH_APPLICATION **************************/

int establish_application(dataptr dz)
{
    aplptr ap;
    if((dz->application = (aplptr)malloc(sizeof (struct applic)))==NULL) {
        sprintf(errstr,"establish_application()\n");
        return(MEMORY_ERROR);
    }
    ap = dz->application;
    memset((char *)ap,0,sizeof(struct applic));
    return(FINISHED);
}

/************************* INITIALISE_VFLAGS *************************/

int initialise_vflags(dataptr dz)
{
    int n;
    if((dz->vflag  = (char *)malloc(dz->application->vflag_cnt * sizeof(char)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY: vflag store,\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<dz->application->vflag_cnt;n++)
        dz->vflag[n]  = FALSE;
    return FINISHED;
}

/************************* SETUP_INPUT_PARAM_DEFAULTVALS *************************/

int setup_input_param_defaultval_stores(int tipc,aplptr ap)
{
    int n;
    if((ap->default_val = (double *)malloc(tipc * sizeof(double)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for application default values store\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<tipc;n++)
        ap->default_val[n] = 0.0;
    return(FINISHED);
}

/***************************** SETUP_AND_INIT_INPUT_PARAM_ACTIVITY **************************/

int setup_and_init_input_param_activity(dataptr dz,int tipc)
{
    int n;
    if((dz->is_active = (char   *)malloc((size_t)tipc))==NULL) {
        sprintf(errstr,"setup_and_init_input_param_activity()\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<tipc;n++)
        dz->is_active[n] = (char)0;
    return(FINISHED);
}

/************************* SETUP_FLATTEN_APPLICATION *******************/

int setup_flatten_application(dataptr dz)
{
    int exit_status;
    aplptr ap;
    if((exit_status = establish_application(dz))<0)     // GLOBAL
        return(FAILED);
    ap = dz->application;
    // SEE parstruct FOR EXPLANATION of next 2 functions
    if((exit_status = set_param_data(ap,0   ,2,2,"dd"))<0)
        return(FAILED);
    if((exit_status = set_vflgs(ap,"t",1,"d","",0,0,""))<0)
        return(FAILED);
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = SNDFILES_ONLY;
    dz->process_type    = EQUAL_SNDFILE;    
    dz->outfiletype     = SNDFILE_OUT;
    return application_init(dz);    //GLOBAL
}

/************************* PARSE_INFILE_AND_CHECK_TYPE *******************/

int parse_infile_and_check_type(char **cmdline,dataptr dz)
{
    int exit_status;
    infileptr infile_info;
    if(!sloom) {
        if((infile_info = (infileptr)malloc(sizeof(struct filedata)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY for infile structure to test file data.");
            return(MEMORY_ERROR);
        } else if((exit_status = cdparse(cmdline[0],infile_info))<0) {
            sprintf(errstr,"Failed to parse input file %s\n",cmdline[0]);
            return(PROGRAM_ERROR);
        } else if(infile_info->filetype != SNDFILE)  {
            sprintf(errstr,"File %s is not of correct type\n",cmdline[0]);
            return(DATA_ERROR);
        } else if(infile_info->channels != MONO)  {
            sprintf(errstr,"File %s is not a mono soundfile\n",cmdline[0]);
            return(DATA_ERROR);
        } else if((exit_status = copy_parse_info_to_main_structure(infile_info,dz))<0) {
            sprintf(errstr,"Failed to copy file parsing information\n");
            return(PROGRAM_ERROR);
        }
        free(infile_info);
    }
    return(FINISHED);
}

/************************* SETUP_FLATTEN_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_flatten_param_ranges_and_defaults(dataptr dz)
{
    int exit_status;
    aplptr ap = dz->application;
    // set_param_ranges()
    ap->total_input_param_cnt = (char)(ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt);
    // NB total_input_param_cnt is > 0 !!!
    if((exit_status = setup_input_param_range_stores(ap->total_input_param_cnt,ap))<0)
        return(FAILED);
    // get_param_ranges()
    ap->lo[0]   = 0.001;
    ap->hi[0]   = 100.0;
    ap->default_val[0]  = 0.1;
    ap->lo[1]   = 20.0;
    ap->hi[1]   = 50000.0;
    ap->default_val[1]  = 20.0;
    ap->lo[2]   = 0.0;
    ap->hi[2]   = dz->duration;
    ap->default_val[2]  = 0.0;
    dz->maxmode = 0;
    if(!sloom)
        put_default_vals_in_all_params(dz);
    return(FINISHED);
}

/********************************* PARSE_SLOOM_DATA *********************************/

int parse_sloom_data(int argc,char *argv[],char ***cmdline,int *cmdlinecnt,dataptr dz)
{
    int exit_status;
    int cnt = 1, infilecnt;
    int filesize, insams, inbrksize;
    double dummy;
    int true_cnt = 0;
//    aplptr ap;

    while(cnt<=PRE_CMDLINE_DATACNT) {
        if(cnt > argc) {
            sprintf(errstr,"Insufficient data sent from TK\n");
            return(DATA_ERROR);
        }
        switch(cnt) {
        case(1):    
            if(sscanf(argv[cnt],"%d",&dz->process)!=1) {
                sprintf(errstr,"Cannot read process no. sent from TK\n");
                return(DATA_ERROR);
            }
            break;

        case(2):    
            if(sscanf(argv[cnt],"%d",&dz->mode)!=1) {
                sprintf(errstr,"Cannot read mode no. sent from TK\n");
                return(DATA_ERROR);
            }
            if(dz->mode > 0)
                dz->mode--;
            //setup_particular_application() =
            if((exit_status = setup_flatten_application(dz))<0)
                return(exit_status);
//            ap = dz->application;
            break;

        case(3):    
            if(sscanf(argv[cnt],"%d",&infilecnt)!=1) {
                sprintf(errstr,"Cannot read infilecnt sent from TK\n");
                return(DATA_ERROR);
            }
            if(infilecnt < 1) {
                true_cnt = cnt + 1;
                cnt = PRE_CMDLINE_DATACNT;  /* force exit from loop after assign_file_data_storage */
            }
            if((exit_status = assign_file_data_storage(infilecnt,dz))<0)
                return(exit_status);
            break;
        case(INPUT_FILETYPE+4): 
            if(sscanf(argv[cnt],"%d",&dz->infile->filetype)!=1) {
                sprintf(errstr,"Cannot read filetype sent from TK (%s)\n",argv[cnt]);
                return(DATA_ERROR);
            }
            break;
        case(INPUT_FILESIZE+4): 
            if(sscanf(argv[cnt],"%d",&filesize)!=1) {
                sprintf(errstr,"Cannot read infilesize sent from TK\n");
                return(DATA_ERROR);
            }
            dz->insams[0] = filesize;   
            break;
        case(INPUT_INSAMS+4):   
            if(sscanf(argv[cnt],"%d",&insams)!=1) {
                sprintf(errstr,"Cannot read insams sent from TK\n");
                return(DATA_ERROR);
            }
            dz->insams[0] = insams; 
            break;
        case(INPUT_SRATE+4):    
            if(sscanf(argv[cnt],"%d",&dz->infile->srate)!=1) {
                sprintf(errstr,"Cannot read srate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_CHANNELS+4): 
            if(sscanf(argv[cnt],"%d",&dz->infile->channels)!=1) {
                sprintf(errstr,"Cannot read channels sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_STYPE+4):    
            if(sscanf(argv[cnt],"%d",&dz->infile->stype)!=1) {
                sprintf(errstr,"Cannot read stype sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGSTYPE+4):    
            if(sscanf(argv[cnt],"%d",&dz->infile->origstype)!=1) {
                sprintf(errstr,"Cannot read origstype sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGRATE+4): 
            if(sscanf(argv[cnt],"%d",&dz->infile->origrate)!=1) {
                sprintf(errstr,"Cannot read origrate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MLEN+4): 
            if(sscanf(argv[cnt],"%d",&dz->infile->Mlen)!=1) {
                sprintf(errstr,"Cannot read Mlen sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DFAC+4): 
            if(sscanf(argv[cnt],"%d",&dz->infile->Dfac)!=1) {
                sprintf(errstr,"Cannot read Dfac sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGCHANS+4):    
            if(sscanf(argv[cnt],"%d",&dz->infile->origchans)!=1) {
                sprintf(errstr,"Cannot read origchans sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_SPECENVCNT+4):   
            if(sscanf(argv[cnt],"%d",&dz->infile->specenvcnt)!=1) {
                sprintf(errstr,"Cannot read specenvcnt sent from TK\n");
                return(DATA_ERROR);
            }
            dz->specenvcnt = dz->infile->specenvcnt;
            break;
        case(INPUT_WANTED+4):   
            if(sscanf(argv[cnt],"%d",&dz->wanted)!=1) {
                sprintf(errstr,"Cannot read wanted sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_WLENGTH+4):  
            if(sscanf(argv[cnt],"%d",&dz->wlength)!=1) {
                sprintf(errstr,"Cannot read wlength sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_OUT_CHANS+4):    
            if(sscanf(argv[cnt],"%d",&dz->out_chans)!=1) {
                sprintf(errstr,"Cannot read out_chans sent from TK\n");
                return(DATA_ERROR);
            }
            break;
            /* RWD these chanegs to samps - tk will have to deal with that! */
        case(INPUT_DESCRIPTOR_BYTES+4): 
            if(sscanf(argv[cnt],"%d",&dz->descriptor_samps)!=1) {
                sprintf(errstr,"Cannot read descriptor_samps sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_IS_TRANSPOS+4):  
            if(sscanf(argv[cnt],"%d",&dz->is_transpos)!=1) {
                sprintf(errstr,"Cannot read is_transpos sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_COULD_BE_TRANSPOS+4):    
            if(sscanf(argv[cnt],"%d",&dz->could_be_transpos)!=1) {
                sprintf(errstr,"Cannot read could_be_transpos sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_COULD_BE_PITCH+4):   
            if(sscanf(argv[cnt],"%d",&dz->could_be_pitch)!=1) {
                sprintf(errstr,"Cannot read could_be_pitch sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DIFFERENT_SRATES+4): 
            if(sscanf(argv[cnt],"%d",&dz->different_srates)!=1) {
                sprintf(errstr,"Cannot read different_srates sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DUPLICATE_SNDS+4):   
            if(sscanf(argv[cnt],"%d",&dz->duplicate_snds)!=1) {
                sprintf(errstr,"Cannot read duplicate_snds sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_BRKSIZE+4):  
            if(sscanf(argv[cnt],"%d",&inbrksize)!=1) {
                sprintf(errstr,"Cannot read brksize sent from TK\n");
                return(DATA_ERROR);
            }
            if(inbrksize > 0) {
                switch(dz->input_data_type) {
                case(WORDLIST_ONLY):
                    break;
                case(PITCH_AND_PITCH):
                case(PITCH_AND_TRANSPOS):
                case(TRANSPOS_AND_TRANSPOS):
                    dz->tempsize = inbrksize;
                    break;
                case(BRKFILES_ONLY):
                case(UNRANGED_BRKFILE_ONLY):
                case(DB_BRKFILES_ONLY):
                case(ALL_FILES):
                case(ANY_NUMBER_OF_ANY_FILES):
                    if(dz->extrabrkno < 0) {
                        sprintf(errstr,"Storage location number for brktable not established by CDP.\n");
                        return(DATA_ERROR);
                    }
                    if(dz->brksize == NULL) {
                        sprintf(errstr,"CDP has not established storage space for input brktable.\n");
                        return(PROGRAM_ERROR);
                    }
                    dz->brksize[dz->extrabrkno] = inbrksize;
                    break;
                default:
                    sprintf(errstr,"TK sent brktablesize > 0 for input_data_type [%d] not using brktables.\n",
                    dz->input_data_type);
                    return(PROGRAM_ERROR);
                }
                break;
            }
            break;
        case(INPUT_NUMSIZE+4):  
            if(sscanf(argv[cnt],"%d",&dz->numsize)!=1) {
                sprintf(errstr,"Cannot read numsize sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_LINECNT+4):  
            if(sscanf(argv[cnt],"%d",&dz->linecnt)!=1) {
                sprintf(errstr,"Cannot read linecnt sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ALL_WORDS+4):    
            if(sscanf(argv[cnt],"%d",&dz->all_words)!=1) {
                sprintf(errstr,"Cannot read all_words sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ARATE+4):    
            if(sscanf(argv[cnt],"%f",&dz->infile->arate)!=1) {
                sprintf(errstr,"Cannot read arate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_FRAMETIME+4):    
            if(sscanf(argv[cnt],"%lf",&dummy)!=1) {
                sprintf(errstr,"Cannot read frametime sent from TK\n");
                return(DATA_ERROR);
            }
            dz->frametime = (float)dummy;
            break;
        case(INPUT_WINDOW_SIZE+4):  
            if(sscanf(argv[cnt],"%f",&dz->infile->window_size)!=1) {
                sprintf(errstr,"Cannot read window_size sent from TK\n");
                    return(DATA_ERROR);
            }
            break;
        case(INPUT_NYQUIST+4):  
            if(sscanf(argv[cnt],"%lf",&dz->nyquist)!=1) {
                sprintf(errstr,"Cannot read nyquist sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DURATION+4): 
            if(sscanf(argv[cnt],"%lf",&dz->duration)!=1) {
                sprintf(errstr,"Cannot read duration sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MINBRK+4):   
            if(sscanf(argv[cnt],"%lf",&dz->minbrk)!=1) {
                sprintf(errstr,"Cannot read minbrk sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MAXBRK+4):   
            if(sscanf(argv[cnt],"%lf",&dz->maxbrk)!=1) {
                sprintf(errstr,"Cannot read maxbrk sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MINNUM+4):   
            if(sscanf(argv[cnt],"%lf",&dz->minnum)!=1) {
                sprintf(errstr,"Cannot read minnum sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MAXNUM+4):   
            if(sscanf(argv[cnt],"%lf",&dz->maxnum)!=1) {
                sprintf(errstr,"Cannot read maxnum sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        default:
            sprintf(errstr,"case switch item missing: parse_sloom_data()\n");
            return(PROGRAM_ERROR);
        }
        cnt++;
    }
    if(cnt!=PRE_CMDLINE_DATACNT+1) {
        sprintf(errstr,"Insufficient pre-cmdline params sent from TK\n");
        return(DATA_ERROR);
    }

    if(true_cnt)
        cnt = true_cnt;
    *cmdlinecnt = 0;        

    while(cnt < argc) {
        if((exit_status = get_tk_cmdline_word(cmdlinecnt,cmdline,argv[cnt]))<0)
            return(exit_status);
        cnt++;
    }
    return(FINISHED);
}

/********************************* GET_TK_CMDLINE_WORD *********************************/

int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q)
{
    if(*cmdlinecnt==0) {
        if((*cmdline = (char **)malloc(sizeof(char *)))==NULL)  {
            sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline array.\n");
            return(MEMORY_ERROR);
        }
    } else {
        if((*cmdline = (char **)realloc(*cmdline,((*cmdlinecnt)+1) * sizeof(char *)))==NULL)    {
            sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline array.\n");
            return(MEMORY_ERROR);
        }
    }
    if(((*cmdline)[*cmdlinecnt] = (char *)malloc((strlen(q) + 1) * sizeof(char)))==NULL)    {
        sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline item %d.\n",(*cmdlinecnt)+1);
        return(MEMORY_ERROR);
    }
    strcpy((*cmdline)[*cmdlinecnt],q);
    (*cmdlinecnt)++;
    return(FINISHED);
}


/****************************** ASSIGN_FILE_DATA_STORAGE *********************************/

int assign_file_data_storage(int infilecnt,dataptr dz)
{
    int exit_status;
    int no_sndfile_system_files = FALSE;
    dz->infilecnt = infilecnt;
    if((exit_status = allocate_filespace(dz))<0)
        return(exit_status);
    if(no_sndfile_system_files)
        dz->infilecnt = 0;
    return(FINISHED);
}



/************************* redundant functions: to ensure libs compile OK *******************/

int assign_process_logic(dataptr dz)
{
    return(FINISHED);
}

void set_legal_infile_structure(dataptr dz)
{}

int set_legal_internalparam_structure(int process,int mode,aplptr ap)
{
    return(FINISHED);
}

int setup_internal_arrays_and_array_pointers(dataptr dz)
{
    return(FINISHED);
}

int establish_bufptrs_and_extra_buffers(dataptr dz)
{
    return(FINISHED);
}

int read_special_data(char *str,dataptr dz) 
{
    return(FINISHED);
}

int inner_loop
(int *peakscore,int *descnt,int *in_start_portion,int *least,int *pitchcnt,int windows_in_buf,dataptr dz)
{
    return(FINISHED);
}

int get_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    return(FINISHED);
}


/******************************** USAGE1 ********************************/

int usage1(void)
{
    usage2("flatten");
    return(USAGE_ONLY);
}

/**************************** CHECK_FLATTEN_PARAM_VALIDITY_AND_CONSISTENCY *****************************/

int check_flatten_param_validity_and_consistency(dataptr dz)
{
    if(dz->param[0] * 2 > dz->duration) {
        sprintf(errstr,"Elementsize (%lf) is too large for input source (duration %lf).\n",dz->param[0],dz->duration);
        return(DATA_ERROR);
    }
    if(dz->param[2] >= dz->duration) {
        sprintf(errstr,"Tail (%lf) is too large for input source (duration %lf).\n",dz->param[2],dz->duration);
        return(DATA_ERROR);
    }
    return FINISHED;
}

/******************************** DBTOLEVEL ***********************/

double dbtolevel(double val)
{
    int isneg = 0;
    if(flteq(val,0.0))
        return(1.0);
    if(val < 0.0) {
        val = -val;
        isneg = 1;
    }
    val /= 20.0;
    val = pow(10.0,val);
    if(isneg)
        val = 1.0/val;
    return(val);
}   

/********************************************************************************************/

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"flatten"))             dz->process = FLATTEN;
    else {
        sprintf(errstr,"Unknown program identification string '%s'\n",prog_identifier_from_cmdline);
        return(USAGE_ONLY);
    }
    return(FINISHED);
}

/******************************** SETUP_AND_INIT_INPUT_BRKTABLE_CONSTANTS ********************************/

int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt)
{   
    int n;
    if((dz->brk      = (double **)malloc(brkcnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 1\n");
        return(MEMORY_ERROR);
    }
    if((dz->brkptr   = (double **)malloc(brkcnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 6\n");
        return(MEMORY_ERROR);
    }
    if((dz->brksize  = (int    *)malloc(brkcnt * sizeof(int)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 2\n");
        return(MEMORY_ERROR);
    }
    if((dz->firstval = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 3\n");
        return(MEMORY_ERROR);                                                 
    }
    if((dz->lastind  = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 4\n");
        return(MEMORY_ERROR);
    }
    if((dz->lastval  = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 5\n");
        return(MEMORY_ERROR);
    }
    if((dz->brkinit  = (int     *)malloc(brkcnt * sizeof(int)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 7\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<brkcnt;n++) {
        dz->brk[n]     = NULL;
        dz->brkptr[n]  = NULL;
        dz->brkinit[n] = 0;
        dz->brksize[n] = 0;
    }
    return(FINISHED);
}

/******************************** USAGE2 ********************************/

int usage2(char *str)
{
    if(!strcmp(str,"flatten")) {
        fprintf(stderr,
        "USAGE:\n"
        "flatten flatten infile outfile elementsize shoulder [-ttail]\n"
        "\n"
        "Equalise level of sound elements in mono src.\n"
        "\n"
        "ELEMENTSIZE Approx size of elements (e.g. syllables) in src.\n"
        "            (Range 0.001 to 100).\n"
        "SHOULDER    Risetime in segment to changed level (mS).\n"
        "            (Range 20 to ELEMENTSIZE/2).\n"
        "            Will never be longer than distance from seg edge to peak.\n"
        "TAIL        Portion of end of sound to be treated as a whole segment.\n"
        "            (Range 0 to < duration).\n"
        "\n");
    } else
        fprintf(stdout,"Unknown option '%s'\n",str);
    return(USAGE_ONLY);
}

int usage3(char *str1,char *str2)
{
    fprintf(stderr,"Insufficient parameters on command line.\n");
    return(USAGE_ONLY);
}

/******************************** GATE ********************************/

int flatten(dataptr dz)
{
    int exit_status, done, all_zero, phasechange, sub_all_zero, sub_phasechange, minwindow, passno;
    double srate = (double)dz->infile->srate, maxval, minval, lastenv, maxsamp, maxmax;
    double magprechange = 0.0, magpostchange = 0.0, incr, mag, lastmag = 0.0, max_samp, local_max_samp, val, normaliser = 1.0;
    float *ibuf = dz->sampbuf[0], *obuf = dz->sampbuf[1];
    int bufpos = 0, n, m, k, j, wsize, bigger_wsize, this_wsize, subwsize, finalsubwsize, this_subwsize;
    int envcnt, trofcnt, nutrofcnt, trofpos, startsamp, endsamp, sub_startsamp, last_startsamp, last_endsamp, zcrospos=0;
    int dove, maxat, seglen, peaksamp, samps_to_peak, samps_from_peak, doveup, dovedn, tail;
    double *env = dz->parray[0], *maxamp;
    int *trof = dz->lparray[0], *peakloc;

    dz->tempsize = dz->insams[0];

    dove  = (int)round(dz->param[1] * MS_TO_SECS * srate);      //  level change time, in samples
    wsize = (int)round((dz->param[0]/(double)WINS_PER_ELEMENT) * srate);
    tail  = (int)round(dz->param[2] * srate);
    tail  = dz->insams[0] - tail;

    maxval = 0.0;
    envcnt = 0;
    bufpos = 0;
    env = dz->parray[0];
    if((exit_status = read_samps(ibuf,dz))<0)
        return(exit_status);

    //  Read envelope at relevant elementsize
    
    done = 0;
    n = 0;
    k = 0;
    this_wsize = wsize;
    while(dz->ssampsread > 0) {
        while(n < this_wsize) {
            if(fabs(ibuf[bufpos]) >  maxval)
                maxval = fabs(ibuf[bufpos]);
            if(++bufpos >= dz->ssampsread) {
                if((exit_status = read_samps(ibuf,dz))<0)
                    return(exit_status);
                if(dz->ssampsread == 0) {
                    done = 1;
                    break;
                }
                bufpos = 0;
            }
            n++;
            k++;
        }
        if(done)
            break;
        env[envcnt++] = maxval;
        n = 0;
        maxval = 0.0;
        if(k + wsize > tail)
            this_wsize = dz->insams[0] - k;
    }
    if(n)       //  If part-window at end, save envelope value for it
        env[envcnt++] = maxval;

    //  Find troughs: at this stage the trof value is the envelope-cnt number

    trofcnt = 0;
    trof[trofcnt++] = 0;
    lastenv = -1.0;

    done = 0;
    n = 0;
    while(!done) {
        while(env[n] >= lastenv) {
            lastenv = env[n];
            if(++n >= envcnt) {
                done = 1;
                break;
            }
        }
        if(done)
            break;
        while(env[n] <= lastenv) {
            lastenv = env[n];
            if(++n >= envcnt) {
                done = -1;
                break;
            }
        }
        if(done)
            break;
        trof[trofcnt++] = n;        //  Remember position of trof in envelope
    }
    if(done < 0)                    //  If we were descending in level at end of envelope
        trof[trofcnt++] = n-1;      //  Last env value is a trof

    //  For each trof, find the true minimum position

    nutrofcnt = 0;
    for(n = 0; n < trofcnt;n++) {
        trofpos = trof[n] * wsize;
        sndseekEx(dz->ifd[0],trofpos,0);
        startsamp = 0;
        if(n == trofcnt - 1 && tail > 0)
            endsamp = dz->insams[0];
        else
            endsamp = wsize;
        bigger_wsize = wsize;
        bufpos = 0;
        if((exit_status = read_samps(ibuf,dz)) < 0)                     //  NB buflen > wsize
           return(exit_status);
        all_zero = 0;
        phasechange = 0;
        if(!is_phase_change(ibuf,&all_zero,&phasechange,startsamp,endsamp))     //  If larger window has no phase-change
            continue;                                                           //  no zero-crossing here, so no zero-trof, continue
                                                                        
        //  recursively split window into 3 and find minimum window             //  Otherwise MUST be a phasechange in some subwindow!! 

        sub_all_zero = 0;
        last_startsamp = -1;
        last_endsamp = -1;
        while(bigger_wsize > WINS_PER_ELEMENT * 2) {
            all_zero = 0;
            phasechange = 0;
            subwsize = (int)round(bigger_wsize/(double)WINS_PER_ELEMENT);       //  Get next smaller window, (1/3 of larger window)
                                                                                //  There may not be an exact number of subwindows within the window, 
            finalsubwsize = bigger_wsize - (subwsize * (WINS_PER_ELEMENT - 1)); //  so final subwindow must be length-adjusted
            this_subwsize = subwsize;
            minval = HUGE;
            minwindow = -1;
            for(k = 0; k < WINS_PER_ELEMENT; k++) {                             //  For all subwindows
                if(k == WINS_PER_ELEMENT - 1)
                    this_subwsize = finalsubwsize;
                sub_all_zero = 0;
                sub_phasechange = 0;
                sub_startsamp = startsamp + (k * subwsize);
                if(!is_phase_change(ibuf,&sub_all_zero,&sub_phasechange,sub_startsamp,sub_startsamp + this_subwsize)) {
                    if(sub_all_zero) {                                          //  IF any subwindow is all_zeros, use this as minimum
                        minwindow = k;                                          //   and quit           
                        break;
                    } else                                                      //  Otherwise, if no phase-change in window
                        continue;                                               //  no zero-crossing to do cut, so ignore this window
                }
                maxval = 0.0;
                for(j = 0; j < this_subwsize; j++) {
                    if(fabs(ibuf[bufpos]) >  maxval)
                        maxval = fabs(ibuf[bufpos]);                            //  Find maxval in each subwindows
                    if(++bufpos >= dz->buflen) {
                        sprintf(errstr,"Error in buffer accounting for subwindows.\n");
                        return PROGRAM_ERROR;
                    }
                }
                if(maxval < minval) {                                           //  Find the minimum of these maxima
                    minval = maxval;                                            //  To find trof window
                    minwindow = k;
                }
            }
            if(minwindow < 0) {
                sprintf(errstr,"Minimum window not set.\n");
                return PROGRAM_ERROR;
            }
            last_startsamp = startsamp;                                         //  Remember edges of this window
            last_endsamp   = endsamp;
            startsamp += minwindow * subwsize;                                  //  Startsamp for nextpass = start of subwindow with min level
            if(minwindow == WINS_PER_ELEMENT - 1)
                endsamp = startsamp + finalsubwsize;
            else
                endsamp = startsamp + subwsize;
            bufpos = startsamp; 
            bigger_wsize = endsamp - startsamp;                                 //  Now make the subwindow the window to be subdivided further
        }
        if(sub_all_zero)                                                        //  If min window is ALL zero
            trof[nutrofcnt++] = trofpos + (startsamp + endsamp)/2;              //  place trof in middle of window
        else {                                                                  //  else there must be a phasechange in the min window
            if(last_startsamp < 0) {
                sprintf(errstr,"last_startsamp not set.\n");
                return PROGRAM_ERROR;
            }
            if((exit_status = find_phasechange_position(ibuf,&zcrospos,last_startsamp,last_endsamp))< 0)
                return exit_status;
            trof[nutrofcnt++] = trofpos + zcrospos;
        }
    }
    trofcnt = nutrofcnt;

    if((maxamp = (double *)malloc(trofcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store amplitudes of segments.\n");
        return(MEMORY_ERROR);
    }
    if((peakloc = (int *)malloc(trofcnt * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store peak locations of segments.\n");
        return(MEMORY_ERROR);
    }

    //  Find maxima between trofs

    sndseekEx(dz->ifd[0],0,0);
    if((exit_status = read_samps(ibuf,dz)) < 0)
       return(exit_status);
    startsamp = 0;
    bufpos = 0;
    for(n = 0; n < trofcnt; n++) {
        if(n == trofcnt - 1)
            endsamp = dz->insams[0];
        else
            endsamp = trof[n+1];
        maxsamp = 0.0;
        maxat = startsamp;
        for(k = startsamp; k < endsamp;k++) {
            if(fabs(ibuf[bufpos]) > maxsamp) {
                maxsamp = fabs(ibuf[bufpos]);
                maxat = k;
            }
            if(++bufpos >= dz->ssampsread) {
                if((exit_status = read_samps(ibuf,dz)) < 0)
                   return(exit_status);
                if(dz->ssampsread == 0)
                    break;
                bufpos = 0;
            }
        }
        maxamp[n]  = maxsamp;
        peakloc[n] = maxat;
        startsamp = endsamp;
    }

    //  Find loudest segment

    maxmax = maxamp[0];
    for(n=1;n<trofcnt;n++) {
        if(maxamp[n] > maxmax)
            maxmax = maxamp[n];
    }

    //  Get normalisers for all segments

    for(n = 0; n < trofcnt;n++) {
        if(flteq(maxamp[n],0.0))
            maxamp[n] = 1.0;
        else 
            maxamp[n] = maxmax/maxamp[n];   
    }
    //  Flatten the source

    for(passno = 0;passno < 3; passno++) {
//      if(sloom) {
            switch(passno) {
            case(0):
                fprintf(stdout,"INFO: Adjusting segment levels.\n");
                break;
            case(1):
                fprintf(stdout,"INFO: Adjusting overall level.\n");
                break;
            case(2):
                fprintf(stdout,"INFO: Writing output.\n");
                break;
            }
            fflush(stdout);
//      }
        dz->total_samps_written = 0;
        sndseekEx(dz->ifd[0],0,0);
        if((exit_status = read_samps(ibuf,dz)) < 0)
           return(exit_status);
        startsamp = 0;
        bufpos = 0;
        max_samp = 0.0;

        for(n = 0; n < trofcnt; n++) {
            if(n > 0)
                magprechange = maxamp[n] - maxamp[n-1]; 
            if(n < trofcnt - 1) {
                magpostchange = maxamp[n+1] - maxamp[n]; 
                endsamp = trof[n+1];
            } else {
                endsamp = dz->insams[0];
                magpostchange = 0.0;
            }
            seglen = endsamp - startsamp;
            peaksamp = peakloc[n];
            samps_to_peak = peaksamp - startsamp;
            doveup = min(dove,samps_to_peak);                   //  Length of transition from previous amp boost
            samps_from_peak = endsamp - peaksamp;
            dovedn = min(dove,samps_from_peak);                 //  Length of transition to next amp boost
            local_max_samp = 0.0;
            for(k = startsamp,j = 0,m = seglen-1; k < endsamp;k++,j++,m--) {
                if(n > 0 && j < doveup) {                       //  j goes  0   1   2   3   4   5   6   7   8 ... 
                    incr = (double)j/(double)doveup;            //  If transit is 3 samps
                    mag  = (magprechange/2) * incr;             //  incr   0/3 1/3 2/3 
                    mag += lastmag;
                    val = ibuf[bufpos] * mag;
                    switch(passno) {
                    case(0):
                        local_max_samp = max(local_max_samp,fabs(val));
                        break;
                    case(1):
                        max_samp = max(max_samp,fabs(val));
                        break;
                    case(2):
                        obuf[bufpos] = (float)(val * normaliser);
                        break;
                    }
                } else if(n < trofcnt - 1 && m < dovedn) {      //  m goes  8   7   6   5   4   3   2   1   0
                    incr = 1.0 - ((double)m/(double)dovedn);    //  If transit is 4 samps
                    mag  = (magpostchange/2) * incr;            //  m/dovedn goes              3/4 2/4 1/4 0/4      
                    mag += maxamp[n];                           //  incr goes                  1/4 2/4 3/4  1
                    lastmag = mag;
                    val = ibuf[bufpos] * mag;

                    switch(passno) {
                    case(0):
                        local_max_samp = max(local_max_samp,fabs(val));
                        break;
                    case(1):
                        max_samp = max(max_samp,fabs(val));
                        break;
                    case(2):
                        obuf[bufpos] = (float)(val * normaliser);
                        break;
                    }
                } else {
                    val = ibuf[bufpos] * maxamp[n];
                    switch(passno) {
                    case(0):
                        local_max_samp = max(local_max_samp,fabs(val));
                        break;
                    case(1):
                        max_samp = max(max_samp,fabs(val));
                        break;
                    case(2):
                        obuf[bufpos] = (float)(val * normaliser);
                        break;
                    }
                }
                if(++bufpos >= dz->ssampsread) {
                    if(passno == 2) {
                        if((exit_status = write_samps(obuf,dz->ssampsread,dz))<0)
                            return(exit_status);
                    } else {
                        dz->total_samps_written += dz->ssampsread;
                        dz->process = GREV;
                        display_virtual_time(dz->total_samps_written,dz);
                        dz->process = FLATTEN;
                    }
                    if((exit_status = read_samps(ibuf,dz)) < 0)
                        return(exit_status);
                    if(dz->ssampsread == 0)
                        break;
                    bufpos = 0;
                }
            }
            if(passno == 0) {
                if(!flteq(local_max_samp,0.0))
                    maxamp[n] *= MAXLEV/local_max_samp;
            }
            startsamp = endsamp;
        }
        if(passno == 1) {
            if(max_samp > MAXLEV)
                normaliser = MAXLEV/max_samp;
            else
                normaliser = 1.0;
        }
    }
    return FINISHED;
}

/****************************** FLATTEN_PARAM_PREPROCESS ******************************/

#define SAFETY  64

int flatten_param_preprocess(dataptr dz)
{
    int arraysize = (int)ceil(dz->duration/dz->param[0]);
    if((dz->lparray = (int **)malloc(sizeof(int *)))==NULL) {
        fprintf(stdout,"ERROR: INSUFFICIENT MEMORY to store Filter Data.\n");
        fflush(stdout);
        return(FAILED);
    }
    if((dz->lparray[0] = (int *)malloc((arraysize + SAFETY) * sizeof(int)))==NULL) {    //  Array for trof locations
        fprintf(stdout,"ERROR: INSUFFICIENT MEMORY to store Filter Data.\n");
        fflush(stdout);
        return(FAILED);
    }
    if((dz->parray = (double **)malloc(2 * sizeof(double *)))==NULL) {
        fprintf(stdout,"ERROR: INSUFFICIENT MEMORY to store Filter Data.\n");
        fflush(stdout);
        return(FAILED);
    }
    if((dz->parray[0] = (double *)malloc((arraysize * (WINS_PER_ELEMENT+1)) * sizeof(double)))==NULL) { //  Array for initial envelope
        fprintf(stdout,"ERROR: INSUFFICIENT MEMORY to store Filter Data.\n");
        fflush(stdout);
        return(FAILED);
    }
    memset((char *)dz->parray[0],0,(arraysize * (WINS_PER_ELEMENT+1)) * sizeof(double));

    if((dz->parray[1] = (double *)malloc(4 * sizeof(double)))==NULL) {
        fprintf(stdout,"ERROR: INSUFFICIENT MEMORY to store Filter Data.\n");           //  Array for shrunk envelopes
        fflush(stdout);
        return(FAILED);
    }
    return FINISHED;
}

/*************************** CREATE_FLATTEN_SNDBUFS **************************/

int create_flatten_sndbufs(dataptr dz)
{
    int n;
    int bigbufsize, secsize;
    int framesize;
    double srate = (double)dz->infile->srate;
    framesize = F_SECSIZE * dz->infile->channels;
    if(dz->sbufptr == 0 || dz->sampbuf==0) {
        sprintf(errstr,"buffer pointers not allocated: create_sndbufs()\n");
        return(PROGRAM_ERROR);
    }
    dz->buflen = (int)ceil((dz->param[0]/2.0) * srate);             //  Buffer must be large-enough to accomodate 1 while envelope-window
    secsize = dz->buflen/framesize;                                     //  Which is roughly 1/3 of elementsize = dz->param[0]
    if(secsize * framesize < dz->buflen)
        secsize++;
    dz->buflen = secsize * framesize;
    bigbufsize = dz->buflen * sizeof(float);
    if((dz->bigbuf = (float *)malloc(bigbufsize  * dz->bufcnt)) == NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to create sound buffers.\n");
        return(PROGRAM_ERROR);
    }
    for(n=0;n<dz->bufcnt;n++)
        dz->sbufptr[n] = dz->sampbuf[n] = dz->bigbuf + (dz->buflen * n);
    dz->sampbuf[n] = dz->bigbuf + (dz->buflen * n);
    return(FINISHED);
}

/*************************** IS_PHASE_CHANGE **************************/

int is_phase_change(float *ibuf,int *all_zero,int *phasechange,int wstart,int wend)
{
    int phase = 0;
    int k = wstart;
    while(ibuf[k] == 0.0) {
        if(++k >= wend) {
            *all_zero = 1;
            return FALSE;
        }
    }
    if(ibuf[k] > 0)
        phase = 1;
    else
        phase = -1;
    k++;
    while(k < wend) {
        if(phase > 1) {
            if(ibuf[k] < 0.0) {
                *phasechange = 1;
                return TRUE;        //  phase changed
            }
        } else {
            if(ibuf[k] > 0.0) {     //  phase changed
                *phasechange = 1;
                return TRUE;
            }
        }
        k++;
    }
    return FALSE;
}

/*************************** FIND_PHASECHANGE_POSITION **************************/

int find_phasechange_position(float *ibuf,int *zcrospos,int wstart,int wend)
{
    int phase = 0;
    int k = wstart;
    while(ibuf[k] == 0.0) {
        if(++k >= wend) {
            sprintf(errstr,"Error: no phasechange found in window.\n");
            return PROGRAM_ERROR;
        }
    }
    if(ibuf[k] > 0)
        phase = 1;
    else
        phase = -1;
    k++;
    while(k < wend) {
        if(phase > 1) {
            if(ibuf[k] < 0.0) {
                *zcrospos = k;
                break;
            }
        } else {
            if(ibuf[k] > 0.0) {     //  phase changed
                *zcrospos = k;
                break;
            }
        }
        k++;
    }
    return FINISHED;
}

